condition mean min max ZT0-3 76.754409 76.754409 76.754409 ZT4-7 86.64481749999999 86.64481749999999 86.64481749999999 ZT8-11 90.64406600000001 90.64406600000001 90.64406600000001 ZT12-15 97.268445 97.268445 97.268445 ZT16-19 63.1855465 63.1855465 63.1855465 ZT20-23 54.5067305 54.5067305 54.5067305